That mean that Dos-8D will never work if someone replace the 6502 with a CMOS version, clever! Depends on the instructions used. Some are the same on 65c02. The Apple II users learn that the hard way when Apple switched (and some user too) from the NMOS 6502 to the CMOS 65C02 version. But the Oric ...

Hmmm... according to the documents I could find online, opcode 04 is essentially a "nop", but it should consume an immediate operand. Looking at the code, I made it count the cycles correctly, but not consume the operand. No need for a message box. If you make all the "DOP" instructions add 1 to PC,...

Gitlab has all the above, and it also can be converted to a private local repo at ease (run Gitlab locally) if its needed .. Also, GitLab has a less-restrictive free-use account level, while GitHub is a tad more intrusive. Its easier, for example, and cheaper, to have free private repo's on GitLab,...

I would be surprised if there was any updates to the Jasmin ROM. Unlike the Microdisc, the creators of the Jasmin (sensibly) kept the complexity of the ROM to an absolute minimum. It reads a boot sector and executes it. You can then load the real "ROM" into the overlay RAM, and it means you can fix ...